With IPHost Network Monitor you can run simple snmp requests against a Netscreen device in your network.
nsNatMipIp
NETSCREEN Nat Mip Ip
1.3.6.1.4.1.3224.11.1.1.2
mip address. A MIP must be in the same subnet as the tunnel interface to which it is linked to; however, for the untrusted interface, a MIP does not need to be in the same subnet. In either case, a MIP must not be the same as the interface address or be in any DIP pool that might also be on that subnet.
Back to NETSCREEN-NAT-MIB MIB page.
IPHost Network monitor allows you to monitor nsNatMipIp on Netscreen device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Netscreen firewalls right now.